Red Blood Cell Distribution Width as a Biomarker of Red Cell Dysfunction Associated with Inflammation and Macrophage Iron Retention: A Prognostic Marker in Heart Failure and a Potential Predictor for Iron Replacement Responsiveness - Artemio García-Escobar; Rosa Lázaro-García; Javier Goicolea-Ruigómez; Gonzalo Pizarro; Alfonso Jurado‑Román; Raúl Moreno; José Ángel Cabrera (Cardiac Failure Review)